Total entries: 333825 Books: 11092 Journal Articles: 266722 Proceedings Articles: 56011
| Year(s) | Total | Books & | Journal | Proceedings/ | |
| Entries | Proceedings | Articles | Edited book | ||
| Volumes | Articles | ||||
| Up to 1974 | 15974 | 57 | 15025 | 892 | |
| 1975 - 1980 | 33772 | 2036 | 25290 | 6446 | |
| 1981 - 1990 | 80654 | 4517 | 58548 | 17589 | |
| 1991 - 2000 | 99189 | 3776 | 77449 | 17964 | |
| 2001 - 2005 | 49278 | 575 | 41122 | 7581 | |
| 2006 | 10149 | 29 | 8191 | 1929 | |
| 2007 | 9143 | 27 | 7963 | 1153 | |
| 2008 | 9714 | 37 | 8550 | 1127 | |
| 2009 | 9097 | 14 | 8298 | 785 | |
| 2010 | 7665 | 19 | 7220 | 426 | |
| 2011 | 5698 | 5 | 5574 | 119 |
Journals indexed: 2150
